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922e0cc26b
To make room for UPM C and C++ sensor code to coexist, all UPM
C++ headers have been renamed from h -> hpp. This commit contains
updates to documentation, includes, cmake collateral, examples, and
swig interface files.
* Renamed all cxx/cpp header files which contain the string
'copyright intel' from .h -> .hpp (if not already hpp).
* Replaced all references to .h with .hpp in documentation,
source files, cmake collateral, example code, and swig interface
files.
* Replaced cmake variable module_h with module_hpp.
* Intentionally left upm.h since this file currently does not
contain code (documentation only).
Signed-off-by: Noel Eck <noel.eck@intel.com>
128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <iostream>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdexcept>
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#include "maxds3231m.hpp"
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using namespace upm;
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MAXDS3231M::MAXDS3231M (int bus, int devAddr) : m_i2Ctx(bus) {
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m_name = "MAXDS3231M";
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m_i2cAddr = devAddr;
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m_bus = bus;
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mraa::Result ret = m_i2Ctx.address(m_i2cAddr);
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if (ret != mraa::SUCCESS) {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": m_i2Ctx.address() failed");
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}
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}
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void
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MAXDS3231M::setDate (Time3231 &time) {
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uint8_t *data = (uint8_t *)&time;
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i2cWriteReg_N (TIME_CAL_ADDR, 7, data);
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}
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bool
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MAXDS3231M::getDate (Time3231 &time) {
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uint8_t buffer[7];
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// We need 7 bytes of data.
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if (i2cReadReg_N (TIME_CAL_ADDR, 7, buffer) > 6) {
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uint8_t century = (buffer[5] & 0x80) >> 7;
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time.second = BCDtoDEC(buffer[0]);
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time.minute = BCDtoDEC(buffer[1]);
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time.hour = BCDtoDEC(buffer[2]);
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time.day = BCDtoDEC(buffer[4]);
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time.month = BCDtoDEC(buffer[5] & 0x1F);
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time.year = (century == 1) ? 2000 + BCDtoDEC(buffer[6]) : 1900 + BCDtoDEC(buffer[6]);
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time.weekDay = BCDtoDEC(buffer[3]);
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return true;
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}
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return false;
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}
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uint16_t
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MAXDS3231M::getTemperature () {
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uint8_t buffer[2];
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uint8_t msb = 0;
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uint8_t lsb = 0;
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i2cReadReg_N (TEMPERATURE_ADDR, 2, buffer);
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msb = buffer[0];
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lsb = buffer[1] >> 6;
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if ((msb & 0x80) != 0)
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msb |= ~((1 << 8) - 1); // if negative get two's complement
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return 0.25 * lsb + msb;
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}
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/*
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* **************
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* private area
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* **************
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*/
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uint16_t
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MAXDS3231M::i2cReadReg_N (int reg, unsigned int len, uint8_t * buffer) {
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int readByte = 0;
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m_i2Ctx.address(m_i2cAddr);
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m_i2Ctx.writeByte(reg);
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m_i2Ctx.address(m_i2cAddr);
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readByte = m_i2Ctx.read(buffer, len);
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return readByte;
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}
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mraa::Result
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MAXDS3231M::i2cWriteReg_N (uint8_t reg, unsigned int len, uint8_t * buffer) {
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mraa::Result error = mraa::SUCCESS;
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error = m_i2Ctx.address (m_i2cAddr);
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error = m_i2Ctx.write (buffer, len);
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return error;
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}
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uint8_t
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MAXDS3231M::DECtoBSD(uint8_t data) {
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return ((data / 10 * 16) + (data % 10));
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}
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uint8_t
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MAXDS3231M::BCDtoDEC(uint8_t data) {
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return ((data / 16 * 10) + (data % 16));
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}
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